To develop endurance, strength, and flexibility, children need to engage in different activities.

Do weight training to develop strength in your arms, chest and shoulders.

"You want to develop strength and flexibility around that core."

Americans owe the greatness of the frontier to developing their freedom and strength.

Soldiers expected to risk their lives should, according to them, develop strength of body and spirit to accept bullying.

There are moves that work on your abs, and ways to develop "core strength".

Members of the other group met with a physical therapist, who taught them exercises to develop balance, strength and mobility.

"That requires total concentration, and you develop mental strength as a bonus," he said.

A similar attempt at developing Norwegian naval strength was, however, rejected by the king.

They develop strength slowly, but their ultimate strength can be very high.